Method of producing scoring implements



Sept. 25, 1951 HERZQG METHOD OF PRODUCING SCORING IMPLEMENTS Filed July 5, 1949 INVEN TOR CARL HERZOG Patented Sept. 25, 1951 "UNITED STATES. 'aoFJFIcE .METHOD OF PRODUCIN G SCORING IM'PLEMENTS Carl 'Hcrzog, Montclair, N. J.

ApplicationJuly 5, 1949, Serial'No;103',061 7 Claims. (01. 76-24) Myinvention relates to amethod' of producing implements for -scoring-glass articles, such as ampules, and to the implements.

An important object of the invention is to provide a methodwherebyscoringelements of -a given length may be formed from-a-continuous metal ribbon in an expeditious manner.

A further object of the invention is to coordinate the several steps of the method *for producting the desired results.

A further object of the invention is to-harden th serrated edge of the implement without hardening the major portion of its body so that the implement will not readily break. In the accompanyingdrawings, forming a part of thi application, and in which like'numera'ls are employed to designate'like parts throughout the same,

Figure 1 is a diagrammatic side elevation of apparatu mployed'in the practice of my method. Figure 2 is a plan view of the ribbon *roll and pull'roll and associatedelements,

Figure-3 is a fragmentary plan view, upon an enlarged scale of thesupporting or ribbon-drum of the cutting mechanism and the cutters,

Figured is a transverse section taken on line 44 of Figure 3,

Figure 5 is a transverse section through the ribbon upon thecompletion of the cutting,

. Figure 6 is a plan view of the knurl-an'dassociated roller, parts brokenaway,

Figure 7 is a furtherenlarged plan view of the ribbon and 'knurl, parts broken away,

Figure 8 is a transverse section taken on'line 88 of Figure 'fi, parts broken away,

' Figure 9 isatransverse section of the-ribbon after the completion of the knurling,

Figure 10 is an enlarged transverse section taken through the ribbon upon the line -l0-l-0 of Figure 1, associated elements being shown-in elevation and broken away,

Figure 11 is a transversesection through the ribbon upon the completion of the-grinding,

Figure 11 is a side elevation of 'a.,burner..-tip or nozzle, the associated ribbon being shown in section, and,

. Figure 12 is-a plan view of a completed product produced by the method.

In the production of the, implements, I start with a spool or roll .of metal ribbon .20 which is supported upon a horizontal shaft 2| to .rotate inia' vertical plane. This metal ribbon is formed of carbon steel. The :ribbon 20 is passed over .a supporting orribbonrollj22 rigidly mounted upon ahorizontal shaft 23, to rotate in a vertical plane.

The rol1 22 "turns 'in thedirection of its arrow and" preferably has "a circumferential speed of about '40feet per minute. The roll 22is -pro v ided atone-end with an annular flange 24, serving as an abutment forth ribbon 20. Ar ranged in advance 0f the ribbon rol-1-22.-.of "the cutting mechanism a grooved pull rel-I 25 rigidly mounted 1 upon a' horizontal :shaft 26 430 rotate in -a--vertica'l plane. The shaft 26is driven by a shaft 26 throng-hthe "medium 0f 11 a slip clutch- 21. The shaft 26'-= is rotated in-a direction to'turnthe-pu1l'rol1 25 in the directi'onmf its arrow which is opposite to the direction ofrotation of the ribbon roll 22. The shaft 26 has *a greater circumferentialspeed than the ribbon 'roll22. Thepull roll -25 canpullthe ribbon only as'fast as it is ied-bytheribbonroll'22; but due to th increased circumferential speed of the shaft 26 and the slip clutch, the pull -ro1l*25'-reta-ins the-ribbon tautbetween thepull- =-rol1 2 Sand the ribbon--roll22. "Th e-ribbon""2ll'is passedover the ribbon-r0111?and"-beneath"the pull roll25 and I is pressed -int0 en agement with the roll" '25 so that it will "not slip thereon by rollers 3|, which are spring pressed.

--One edge of the ribbonill*engagesthefiange 24, while its opposite ,or free edge "pr j cts axial y beyond the roll '22 andis engaged .byi-Spa-ced' c ting "tools -32. These cutting tOOls. are suitably angularly arranged toform an inclined or beveled face 20' upon the ribbon-2D. The cuttingitools are spaced diiierenttradia'ldistances from the ribbon roll 22 and" each'successive cutting tool is nearer to5the roll 22 with respectrtothe leading end of the ribboniorthe direction: in which the roll 225is turning. fItjis thusseen'that as the ribbonitravels over the .roll22, it is. brought succes siv ily int ngagement with thestationary .Snaced cutting tools'whi'ch successively. out or planethe free end of "the ribbon ;'for providingthe beveled face 20'. .This beveled Izfaceis disposed uppermost. In. orderfthat the ribbon may not slip uponthe .roll' 22,. it is, passed beneath flanged guide rollers 33; ;disposed"upon opposite, sides'of the ribbonyro'll .22 atitheelevation ofits axis .of rotation. The'rolls;3.3 are, driveninthe direction of their arrows and. have thesame eircumferen tia1 .speed as the ribbon roll"'2 2. The rollst33-are springpressed againstthe ribbon and are posi-.

tively driven and .may' be, geared "to .the roll'22. The ribbon isthereforejheld in firm engagement with the upperhalf gof themeriphery Oftitheroll 22. It is thus seenithatthe-ribbon isgui'ded and fed longitudinally and duringthis jfeeding move- 1 3 out by the stationary cutting tools to provide the upper beveled face 20.

After the cutting of the beveled face 20, the then tapered, beveled or sharpened free edge of the ribbon is subjected to a knurling operation, while the ribbon is still traveling over the ribbon roll 22 for forming teeth T. This knurling operation is effected by a knurl 34, disposed near the free end of the roll 22 remote from the flange 24. The knurl is rotatably'supported to turn upon a vertical axis and is positively held in position. As the ribbon passes behind the knurl 34, the teeth 35 of the knurl form the teeth T. These teeth T are formed in that portion of the ribbon having the beveled face 20'. The teeth 35 are radially shorter than the width of the beveled face 20' and the teeth T have their spaces 36 terminating short of the inner edge 3'! of the beveled face 20', as clearly shown in Figure '1.

The teeth 35 are longer than the teeth T and the teeth T have straight edges 36' and sharp corners 31. Due to the beveled face 20' and the knurling action a light burr 39 is formed upon ,the free edge of the ribbon or its teeth T. Figure 9 shows the ribbon in cross section after the cutting and knurling operation.

The next step in the method is to grind the serrated edge of the ribbon upon that side thereof remote from the beveled face 20'. The grinding is effected after the ribbon leaves the ribbon roll 22 and the ribbon is then passed beneath a roll 39, having a flange 40. The roll 39 has a horizontal axis of rotation. The roll 39 may be positively driven at the same circumferential speed as the roll 22 or it may be turned by contact with the ribbon. The ribbon also passes over grooved rollers 4 I, having horizontal axes of rotation. The ribbon is held taut and is retained in firm engagement with the roll 39. The serrated edge of the ribbon projects axially beyond the roll 39, and the serrated edge is subjected to the action of a rotary grinding wheel 42, having a horizontal axis 43 extending longitudinally of the ribbon and ate. right angle to the axis of rotation of the roll 39. The grinding wheel 42 is driven by any suitable means. The grinding wheel 42 is arranged beneath the roll 39 and the grinding wheel is adjusted to bring the same into engagement with the lower face of the serrated edge of the ribbon, to effect the desired cut. The 1-' grinding wheel cuts a lower beveled face 44 upon the teeth of the ribbon and this lower beveled face intersects the upper beveled face 20, producing the sharp cutting edges 36', and removing the burrs. The metal ribbon thus treated is formed of carbon steel, which has not been hardened, and the next step in the method is to harden the teeth or beveled edge of the ribbon. is effected by passing the ribbon through a' heating unit 46, in which flames are projected upon the serrated edge of the ribbon from burners 48', Figure 11*". The flames from the burners heat the serrated edge of the ribbon, to a red or cherry red heat, throughout their entire thickness, but the remainder or body portion of the ribbon not engaged by the flame is not so heated. After the heat treatment of the serrated or cutting edge of the ribbon, the ribbon is immediately passed through a quench device 41 and the then heated cutting edge of the ribbon is chilled by contact with coolor cold water, in accordance with the usual method of hardening metal. The serrated or cutting edge of the ribbon is therefore hardened throughout its entire thickness while normal condition and is not rendered brittle and will not break.

After passing from the quench 41, the teeth are subjected to the action of a scale removing rinding wheel or wheels 48, driven by any suitable means.

The ribbon 20 passes about and below the pull roll 25, as stated, and is provided above this pull roll with a loop 21W. The ribbon then passes to a reciprocatory feeding element 49 and through a check 50 before it reaches the reciprocatory feeding element 49 to prevent back feed. The reciprocatory feeding element 49 provides a stepby-step feed of the ribbon, for a selected length for each step, and the ribbon is then passed beneath a punch 5| which severs the ribbon into the implements of the desired length and forming curved and straight ends 52 and 53. Since a reciprocatory feeding element 49 is provided, it is diflicult to properly time the same with respect to the continuous feeding ribbon and the loop 20 is provided for this purpose. The reciprocatory feeding element 49 will advance the ribbon slightly faster than the pull roll 25 and when the loop 20 is reduced to a given point, this loop swings a lever 52 forwardly, which lever has a part engaging the ribbon. The lever opens a switch which controls the drive of the reciprocatory feeding element 49. The reciprocatory feeding element is then stopped momentarily while the pull roll 25 continues to rotate and as soon as the proper loop 20 is restored, the lever being biased in that direction closes the switch and the reciprocatory feed element again starts.

The completed implement is shown in Figure 12. The implement includes a body portion which is not hardened having the fine sharpened teeth T which are hardened throughout their entire thickness. The entire inclined or beveled face 20 is thus hardened, as indicated by the shade line in Figure 12. The teeth T have sharp straight edges 53 corresponding to the edges 36 and sharp corners 54' corresponding to the corners 31'. This implement is useful in scoring ampules containing chemicals or medicines which must be completely sealed prior to their use. It is customary to score such ampules prior to breaking.

While I have shown apparatus suitable for the practice of the method, the practice of the method is not restricted to the use of this apparatus, as other types of apparatus or parts thereof may be used, and the method also may be practiced by hand.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that certain changes may be resorted to in the order of the steps of themethod, without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. The method of producing scoring implements from a metal ribbon, comprising supporting and feeding the ribbon longitudinally, cutting one edge of the ribbon during its longitudinal travel for producing a beveled face, then knurling the edge of the ribbon having the beveled face during its longitudinal travel for forming teeth.

then cutting'the beveled edge of the ribbon upon the side thereof remote from the beveled face for cutting oiT the free ends of the teeth and providing the teeth with oppositely disposed beveled the body portion of the ribbon remains in its faces and sharp cutting edges, hardening the teeth thus formed, and severing the ribbon to produce the implements.

2. The method of producing scoring implements from a metal ribbon, comprising supporting and feeding the ribbon continuously longitudinally, cutting one edge of the ribbon during its longitudinal travel for producing a beveled face, then knurling the edge of the ribbon having the beveled face during its longitudinal travel for forming teeth, then cutting the beveled edge of the ribbon upon the side thereof remote from the beveled face for cutting off the free ends of the teeth and forming the teeth with oppositely disposed beveled faces and sharp cutting edges, then hardening the teeth thus formed during the longitudinal travel of the ribbon, effecting an intermittent longitudinal movement of the ribbon at its leading end portion, and severing the leading end of the ribbon to produce the implements.

3. The method of producing scoring implements from a metal ribbon, comprising supporting and feeding the ribbon longitudinally continuously, cutting one edge of the ribbon during its longitudinal travel for producing a beveled face, then knurling the edge of the ribbon having the beveled face during its longitudinal travel for forming teeth, then cutting the beveled edge of the ribbon upon the side thereof remote from the beveled face for cutting off the free ends of the teeth and forming the teeth with oppositely disposed beveled faces and sharp cutting edges, hardening the teeth thus formed, effecting an intermittent longitudinal movement of the leading end of the ribbon and maintaining a loop in the ribbon, and severing the leading end of the ribbon in succession to produce the implements.

4. The method of producing scoring implements from a metal ribbon, comprising supporting and feeding the ribbon longitudinally, cutting one edge of the ribbon to produce a beveled face, knurling the edge of the ribbon having the beveled face for forming teeth, then cutting the beveled edge of the ribbon upon the side thereof remote from the beveled face for cutting 011' the free ends of the teeth and providing the teeth with oppositely disposed beveled faces and sharp cutting edges, hardening the teeth thus formed without hardening the body portion of the ribbon, and severing the leading end of the ribbon to produce the implements.

5. The method of producing scoring imple ments from a metal ribbon, comprising rigidly supporting a portion of the ribbon and feeding the same longitudinally, subjecting the free edge of the ribbon while rigidly supported and traveling to planing actions for cutting a beveled face, then knurling the edge of the ribbon having the beveled face during the rigid supporting and longitudinal travel for forming teeth, rigidly supporting the ribbon after the knurling, then grinding the free edge of the ribbon upon the side thereof remote from the beveled face while it is traveling and rigidly supported for cutting off the free ends of the teeth and providing the teeth with oppositely disposed beveled faces, then hardening the teeth thus formed, and severing the leading end of the ribbon to produce the completed implements.

6. The method of producing scoring implements from a metal ribbon, comprising rigidly supporting a portion of the ribbon and feeding the same longitudinally, subjecting the free edge of the ribbon while rigidly supported and traveling to a planing action for cutting a beveled face, then knurling the edge of the ribbon having the beveled face during the rigid supporting and longitudinal travel for forming teeth, then grinding the free edge of the ribbon upon the side thereof remote from the beveled face during the rigid supporting and longitudinal travel for cutting off the free ends of the teeth and providing the teeth with oppositely disposed beveled faces and elongated sharp edges, then hardening the teeth thus formed without hardening the body portion of the ribbon, and then severing the leading end of the ribbon to produce the implements.

7. The method of producing a scoring implement from a metal ribbon, comprising supporting and feeding the ribbon longitudinally, cutting one edge of the ribbon to produce a beveled face, knurling the edge of the ribbon having the beveled face for forming teeth, forming sharp cutting edges upon the teeth, hardening the teeth thus produced, and severing the ribbon for producing the implement.

CARL HERZOG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 371,778 McDougall Oct. 18, 1887 1,712,034 Fromm May 7, 1929 2,281,007 Page Apr. 28, 1942 2,410,901 Ramsey Nov. 12, 1946 FOREIGN PATENTS Number Country Date 293,719 Italy Mar. 1, 1932 884,210 France Apr. 19, 1943 

